to emerging markets and natural resources but japan's sluggish economy forced its leaders to cut oda. they slashed it to less than half of what it was at its peak in the 1990s. however, they're determined to maintain a presence so they've come up with a new strategy. nhk world explains. >> reporter: senegal, western africa. for years, a japanese government agency called the japan international cooperation agency, has provided aid to the country. last year in this village, japan installed a system to purify water. the program helped. the system uses water. even though this is a project, a private company does the filtering free of charge. >> tasty. >> translator: now we don't get sick after drinking water. >> reporter: at the moment, the group is working on the aid project with private companies. until recently, the agency planned the projects. then it commissioned private companies to carry them out. but the japanese government pays the bill. under the new system, it's the company that does all the planning. jica pays up to $560,000 in research fees. the other company pace the costs.